Extractor for pulping devices



Sept. 3, 1929. I w. WERNER EXTRACTOR FOR PULPING DEVICES Filed Aug. 29, 1928 INVENTOR Patented Sept. 3, 1929.

UNITED STATES.

1,726,874 PATENT OFFICE.

WALTER WERNER, OF HOOSIGK-FALLS, NEW YORK,

MACHINE 00., OF HOOSICK FALLS, NEW YORK,

ASSIGNOR TO THE NOBLE & WOOD A CORPORATION OF NEW YORK.

EXTRACTOR FOR PULPING DEVICES.

Application filed August 29, 1928. Serial No. 302,679.

stock from pulping engines, tubbeaters, and

other devices wherein the hydrated stock is caused to circulate under the urge of propelling mechanism.

The mannei in which I have accomplished my object is illustrated by the accompanying drawings, which are in a certain sense illus- I 5 trative only, and in which:

Fig. 1 is a plan viewof a tub beater (parts broken away) provided with my improved continuous extractor; and Fig. 2 an irregular section as along the line 22 on Fig. 1, propeller and shaft not being cut.

Fig. 3 is a fragmentary section through the extractor point in a tub eater provided with my improved extractor, and illustrates a modified form of extracting port.

The same reference characters refer to the same parts throughout the several views.

Referrin to the drawings, A represents the tub em%odying this invention; B. and C the usual beater roll and bed plate; and D the back fall. M represents the midfeather which in the form illustrated divides -at the one end so as to form the diverging walls F and G which extend across and block the usual free way between the midfeather and the wall of the tub.

Each of the walls F and G has an opening therethrough, the two being in alignment, and in these openings a perforated tubular shell H is secured in any suitable manner.

This tubular shell spans the space between the walls F and G and so forms a cov- I ered passageway which interrupts the usual channel-way for the passage of the work, and

wall of the covered passageway (in this case .w1ll escape and so into which the whole of the work must enter fwhen being circulated under the impulsion from one side of the tub to the other) and at or near the end thereof where the work will normally enter, is a propeller K, which is secured on a shaft mounted concentric with the shell H, and adapted to be driven from an available source of power in any suitable manner. No details of the shaft mounting or the manner in which it may be driven is shown.

While I have illustrated my improved ex- 7 tractor as being installed at the end of the tub just behind the back fall, I may locate it at the opposite end, or at some point in its length; and while I have illustrated it only as applied to a tub beater, it may be applied to other forms of pulping devices as well.

My improved continuous extractor operates as follows:

When a pulping device equipped therewith is operating normally, i. e. with a normal amount of hydrated stock and at the normal speed, the stock is driven along under the urge of the propelling mechanism (in the installation illustrated this is a beater roll) against the wall G and /or into the entrance end of the covered passageway formed by the perforated shell H. It here comes into contact with the propeller K which is adapted not only to speed up its rate of travel but to also urge it toward and against the perforations in the wall of the passageway over which it will flow, and through which the sufliciently fined parts of the stock leave the tub by way of the exit port E.

By causing the work to flow through the covered passageway at a comparatively high speed I find that there is little, if any tendency for the perforations to become clogged; the force of the flowing stock being sufiicient to keep the perforations clear.

I claim:

1. Inna pulping'device: an extractor comprising a tubular member with perforations through the wall thereof, said member located and so mounted in the channelway for the stock that all of it must pass thereinto as it is circulated; and means whereby stock escaping from said tubular member through said perforations will be conducted out of the device.

2. In a pulping device: an extractor comprising a tubular member with perforations through the wall thereof, said member located and so mounted in the channel-way for p the stock being worked that said stock must ass thereinto when it is circulated; means for speeding up the rate of travel o'fand forcing said stock toward and against the wall of said tubular member as it travels theretlirough; and means whereby stock escaping from said tubular member. through said perforations will be conducted out of the device.

3. In a tub beater: a covered passageway interrupting and somewhat restricting the channel way between the mid-feather and the wall of the tub; perforations through the wall of said passageway; an exit port whereby matter escaping from said passageway through said perforations will be delivered outside the tub; and means for speeding up the flow of stock through said passageway sufficiently to nullify the blocking efiect thereof upon the circulation.

4. In a usual tub beater: a spaced pair of partition walls blocking the normal channelway' between the mid-feather and the wall of the tub; a perforated tubular member mounted in and throu h said spaced pair of partition walls and ridging the space therebetween; and an exit port from between said partitions to the outside of the tub.

5. In a pulping engine: a normally submerged tubular member forming a part of the channel-way for the stock being worked; perforations through the wall of said Dassageway; means for directing the stock passing through said tubular member toward'said perforations; and means whereby matter escaping through said perforations will be delivered outside the engine.

In testimony whereof I have afliXe'd my signature.

' WALTER WERNER. 

